[Desktop] Troubleshooting - 「Secure Boot Violation」 Appears at Startup

If the message 「Secure Boot Violation」 appears during startup, preventing you from accessing the system, please refer to this article for instructions.

To protect user's systems from malware attacks, ASUS Computers implement the Microsoft Secure Boot feature by default. This feature performs a legal loader check to boot into the OS. 

As Windows 7 does not support Secure Boot (http://technet.microsoft.com/en-us/library/hh824987), with the update of KB3133977, the system might detect inconsistent OS loader keys, resulting in boot failure.

In Windows 8.1/10/11 PC, the system might detect inconsistent OS loader keys and result in boot failure because you had the OS re-installed, installed with an OS other than the preinstalled version.

Please change the Secure Boot settings in the Bioses configuration as outlined in the steps below, this will allow the system to boot into the operating system successfully.

1. First of all, the computer needs to enter Bioses configuration. While the computer isn’t powered on yet, press and hold [F2] button  (or [Del] button ) of the keyboard, and then press the [Power button] to enter the Bioses configuration. (Do not release the F2 or Del button until the Bioses screen shows up.)  
   
2. In Bioses configuration, you are able to select and choose the item via Arrow Keys and Enter of keyboard, Touchpad or Mouse.  
   
3. Disable the Secure Boot feature. The configuration locations for Secure Boot may vary depending on the product model. You can refer to the following two methods for different settings:

6. Save & Exit. Press Hotkey [F10] and select [Ok]⑤, the computer will restart and enter the OS.  
   

If your problem is not resolved with the above solution and information, please contact ASUS Customer Service Center for further information.